Window-guard



B'. c; PETT ERSO N.

WINDO'W GUABDL APPLICATION men MAR. 26. 19"2o.

Patented my 111921.;

2 SHEETSSHEE T I.

v ATTORNEYS B. c. PETTERSON; wmpow GUARD. APPLICATION FILED MAR. 26, I920.

, Patented May 17, 1921.

2 SHEETS SHEET llVl/E/VTUR 3 C 77542? WITNESSES 1 UNITED STATES IBIlilIt'JJILL CARL PET'I'ERSON, F MEMPHIS, TENNESSEE.

wINnow-eumn.

Application filed March 26, 1920. Serial No. 369,058.

T 0 all whom it may concern Be it known that I, BERTILL CARL Pn'r'rnn son, a citizen of the United States, and a resident of Memphis, in the county of Shelby and State of Tennessee, have invented a new and useful Im rovement in Window-Guards,-

. spect to one another and the two cross bars 12 and 13 between the upper inactive posiof which the ollowing is a specification.

M present invention relates generally to windbw guards and more particularly to guards in the nature of curtains, my object being the provision of an automatically dropping curtain foruse in connection with store or display windows and normally controlled and held in ineffective position by means shiftable under excessive vibration-to release the guard for movement downwardly to effective position covering the window space. p I

A further object of my invent on is the provision of a slatted guard screen which may be normally held. in an upper practlcally concealed position together with means for locking the same inlower effective position covering the window space, the said locking means automatically actlng when the screen or curtain drops.

Withl these general objects in mind, further objects and the resulting advantages of my invention will be readily apparent from the following description which refers to the accompanying drawings, forming a part of this specificatlon and wherein, Figure 1 is a front elevation of a display window rovided with my improvements, showing t e same in upper inactlve positlon, Fi 2 is a similar view with the screen or curtain dropped and secured in efi'ectlve position, I I,

Fig. 3 is a vertical section taken on thellne 33 of Fig. 1, g I

' Fig. 4 is an enlargedvertical sectlon ad acent to the lower portion of the curtain or screen in the upper inactive position,

Fig. 5 is a detail horizontal section taken on the line 5-5 of Fig. 2,

Fig. 6 is a detail perspective view of the supporting bracket, and

Fig. 7 is a detail section through one off the rock bar carriers of the curtain or screen.

Referring now tothese figures and ticularly to Figs. 1 and 2 illustrating s ow windows 10, I mount within these show win-- dows for the purposes of my invention, a pair of side uprights 11, preferably of cylindrical form, to the upper ends of whlch the screen is secured at its opposite ends. The

Specification of Letters Patent. Patented May 17, 1921,

screen includes a lower cross bar 13 and a series of parallel slats 14 between the bars and connected to the latter by lazy tongs 15 so that the slats are movable freely with retion of Fig. 1 where the screen is collapsed and the active osi'tion of Fi 2' where the screen is extendiedor dropped.

At its opposite ends the lower cross bar 13 has vertically spaced; roller carrying brackets 16, each of which supportsrollers 17 in engagement with one of the uprights 11 at diametrically opposite points, so as to effectively guide the lower cross bar in its downward movement and prevent the same from binding.

Intermediate its ends and upon its outer face the lower cross bar 13 has a recess 18 adapted to receive the head 19 of a bolt 20 4. The outer end of the latch olt 20 is con caved to receive one end of a key 24'whose opposite end is adapted to bear against the] inner surface of the window glass 23 and thus brace the latch plate21 against the outer face of the guard screen and hold theinner head 19 of the bolt in the recess 18 "of the lower cross bar13 to prevent the screen from dropping. At its outer end the key 24 has an eye 25 to which one end of a chain 26 is mounted, the opposite end of this chain being connected to a trip arm 27 whose upper weighted end 28 normally rests against the window glass 23 in the inactive position shown in Fig. 3. One end of the tri brai cke't 29 secured to an attaching block 30 which is in turn fastened to the inner surface of the Window glass 23 at or about the center of the window as by means of any arm 27 is. pivotally mounted in a i suitable adhesive or cement, the pivot support of the trip arm 27 adapting the latter to swing inwardly and downwardly in case of excessive vibration of the window glass; 23, so that during such movement it will pull downwardly upon the chain 26 and thus jerk the bracing key the position shownm Figs. 3 and 4. This permits the latch plate 21 to swing toward 24 downwardly from the window glass 23 and away from the guard screen, withdrawing the inner head 19 of the latch'plate from the recess of the lower cross bar 13 so that the screen is thus free to drop in guided relation across the window opening and to the effective position shown in Fig. 2.

It is intended that the trip arm 27 shall be so positioned in practice as to avoid its accidental movement or its movement under ordinary vibrations of the window caused by adjacent vehicular traffic or the mere placing of hands against the window glass and still be sufiiciently sensitive to operate upon any vibration whose extent is such that it endangers the safety or integrity of the glass.

For this purpose the lower ivot of'the trip arm '27 is preferably carried y an adjustable plate 31 as seen.in Fig. 6, mounted to slide in rooved walls-32 of thebracket 29 toward v an away from the window glass, this adjusting plate being secured in selected position by a clamping screw 33 extending through its slots'34 and threaded into the bracket 29. I

I further propose to effect automatic locking of the screen when it drops and for this purpose I provide the lower portion of the same frame with socket members 35 containing locks somewhat similar to the locks of desks for covers'adapted to receive the lower. free ends of rack bars 36 depending from the lower cross bar 13 and preferably supported with their upper portions movable through brackets 37 carried by the said cross bar, above which the upper ends of the rack bars are headed. These brackets or holders .37 preferably have ratchet levers 38 adapted to engage the'rack bar 36 and thus permit the rack bars to yield automatically when their lower ends have entered the keeper sockets'35 in locked relation as in Fig. 2, and in this way impose a gradual check to the lowering movement of the screen without placing the burden of its impact against the locking sockets.

To prevent excessive lowering movement of the screen and support the same in its lowered position in such manner that it can be readily raised, each of the several toggle arms 15 is provided with an extending end provided w1th an angular portion 40 with 4 which the next adjacent arm comes into .engagement which is still in angular relation an thus the several arms of the toggle le vers or lazy tongs will be readily movable to the collapsed or folded position when the screen is raised.

It is obvious that my; invention as thus constructed and adapted to operate may be utilized for the protection of store, show windows, and in fact display windows of mucus characters, and will in its. upper normal or collapsed position be practically invisible through its location behind either the upper side portions of the window or a small drop curtain with which store and show windows are commonly provided.

It is also obvious that my invention will be effective for the purposes described and particularly where the show or display window has been broken with a view to entrance in this way to a store, my improved screen will in its lower position cover the broken window in such a way as to prevent entrance and defeat the purposes for which the window was broken.

1. The combination with a window frame having a glass, of a guard screen extensible and collapsible within the window to cover the said opening and means connected to the window glass and controlled by the vibration thereof for normally holding the screen in folded or collapsed position.

2. The combination with a window frame having a glass, of an extensible guard screen normally collapsed at the upper portion of the window and movable by gravity to extended position downwardly across the window opening, and means connected to the window glass and controlled by the vibration thereof for normally holding the guard screen in collapsed position.

3. A window guard of the character described including uprights, upper and lower cross'bars of WhlCh the upper cross bars are secured to the uprights and the lower cross bar has sliding connection therewith, a series of slats parallel with and between the cross bars, toggle levers connecting the slats and cross bar, trip controlled means for normally holding the screen in upper collapsed position, and means for locking the screen in lowermost position.

4. A window guard of the character described including uprights, upper and lower cross .bars of which the upper cross bars are secured to the uprights and the lower cross bar has sliding ,connection therewith, a series of slats parallel with and between the cross bars, toggle levers connecting the slats andcross bar, trip controlled means for normally holding the screen in upper collapsed position and means for locking the screen in owermost position, said last-named means including rack bars carried by the lower cross bar and yieldable with respect thereto and ratchet levers carried by the lower cross bar and engaging the rack bars.

5. The combination with a display window having a glass, of a gravity guard screen collapsible in the upper portion of the display window, a latch plate engaging a portion of the screen to normally hold the same in collapsed position, a key supporting the latch plate and braced between the same and the window glass, and a' trip arm movable by excessivevibration of the movement of the trip, arm.

7. The combination with a display winglass, said trip arm scribed.-

dow of an extensible guard screen normally held in collapsed position inthe upperpor tion thereof and means for controlling the screen including latch means engaging the screen, a key normally braced between the latch means and the window glass, a bracket supported by the window-f glass, and a Weighted trip armpivotedtothe bracket.

and normally restin against the window being connected to the key for displacing the latter upon swinging movement of the trip arm; and meansadjustable on the bracket toward and away pivot of the trip arm, for the purpose de:

BERTILL CARL PETITERSON.

. from the windowglass and supporting the p 

